Dust-collecting receptacle for vacuum-cleaners



M. J. QUINN. DUST COLLECTING RECEPTACLE FOR VACUUM CLEANERS.

APPLICATION HLED FEB. 28, 1920.

1,363,753, mama Dec. 28,1920.

2 SHEETS-SHEET I- APPLICATWN FILED FEB. 28, 1920.

L T n 8 4 m u d2 w m a P man'rrn JosErnoUxNN,

DUST-COLLECTING RECElfi AOLE FOR VAGUUM-CLEANEBS.

To allwhom it may conccrn;

Be it known, that I, MARTIN Josnrfi QUINN of the city of Toronto, in thecounty of Yor' and Province of Ontario,'Dominion of Canada, haveinvented certain new and useful Improvements in Dust-ColleetinReceptacles for Vacuum-Cleaners; and hereby declare that the followingis a full, clear, and exact description of the same.

This invention relates to a dustpollecting receptacle for a vacuumcleaner which will not appreciably restrict the formation of the vacuuimIn the operation of a vacuum cleaner the resistance or back pressureresulting from the limited outlet area for the air prevents or at leastchecks'the formation of a (30"1 plete vacuum at the mouth ofthe tool andthus, restricts the efliciency of its operation to a marked degree.

To obviate \this is the object of the present invention, which isattained by constructing the dust'collect-ing receptacle with anoutletarea for the escape of theair'approximately equal to thevaeuum-anea'at the mouth of the tool, and to so arrange the structuraldetails of this receptacle that: while the outlet-area for the escape ofthe air is so increased there will be no increase in the external cubicdimensions.

For an understanding of the invention reference is to be had to thefollowing description and to the accompanying drawings in wlnch:

Figure 1, is a vertical sectional elevation of a dust collectingreceptacle made in accordance with this invention,

Fig. 2, is a cross section on the line 11.

ig. 3, is a similar view to 1, of a modification of the constructionshown in the latter figure,

Fig. 4, is a cross section on the line 22 Fig. 3, r

Fig. 5, is a detail view showing the method of making the inner tube ofthe dust collecting receptacle shown in Fig. 3, and

Fig. 6, is a sectional elevational view of a further modification of thereceptacle.

Like characters of reference refer to like parts throughout thespecification and drawings.

Specification of Letters Patent.

Patented Dec. 28, 1220.

Applicat 6n filed February 25, 1920. Serial no. 302,091.

external wall a is an inlet'opening b for attachment to a vacuumcleaner; This wall is preferably made of a textile fabric material suchas cotton or the like woven so as to retain the dust particles and topermit of the escape of theair through its interstices or foraminations,but it may be made of wire gauze or other suitable foraminated material.

In F igs. 1 and. 2, an internah wall in the form of it tube 0 is shownto be contained within the external wall a, this tube having an \axialbore 0, and a closed bottom a in the 'vicinity'of and opposed to theinlet \opcning b. r

The tube 0 extends through the top a of theexternal wall a, the top ofthe bore being open forthe unimpeded escape of the air passing throughthe internal wall into the bore.

Preferably at diametricallyopposite points .of its circumference thetube cis stitched to the inner surface of the external Wall aas shown atc in Fig. 2. This con struction forms four dust collecting chamhers d,between the internal wall 0, and the Fig. 2.

he air passing through the foramin ations of the internal wall to thebore 0 escapes from it through the outlet opening at the top of the borec". I

By this means the outlet area for the escape of the air from the dustcollecting receptacle is approximately twice the outlet area where asingle wall is used and it has been demonstrated with the use of a dustcollecting receptacle made in accordance with the-subject matter of thisapplication that a vacuum of maximum value can be maintained at themouth of the vacuum tpol, Whereas'a vacuum greatly less than maximumvalue can be maintained where a dust collecting receptacle with a singlewall is employed, when the external cubic dimensions of the externalwall are the same in both cases, the efiect of this construction beingto increase the operation of the vacuum cleanerto approximately onehundred per cent. efliciency.

In Fig. 3, I use the same construction for the external wall a, inletopening b, and outlet through the top a, but in this figure I havechanged' the formation of the inter-, nal wall. This internal wallconsists of a tubular section 0' stitched to the outer wall a, as in thecase of Figs. 1 and 2 to form four dust collecting chambers (l, and acen tral tubular section 6 within the tubular section a forming a fifthdust collecting chamber. As shown in Fig. 3, the lower end of thecentral tubular Section 6 is united with the lower end of the tubularsection 6, but from its junction at that point is entirely freetherefronr This arrangement forms an air duct 7 be tween the tubularsections 0, c", the upper end f" of which has an outlet to theatmosphere throu h the outlet opening a.

As shown in l ig. 3, the lower end of the tubular Section e" is open andthe upper end is closed, and in the same figure the lower end of the airduct f, which is opposed to the inlet opening I) is closed and the upperend is opened. In this construction the dust laden air entering the dustcollecting receptacle passes into the five dust collecting chambers,where the dust is retained, the air then passing through the externalwall to the atmosphere and through the walls of the tubular sections tothe air duct f fromv which it escapes through the opening at the to l)of the duct.

n Fig. 6, I have shown a similar construction to Fig. 1, but instead ofhaving the outlet opening at the top of the external wall a, I arrangethis outlet opening 9 near the bottom of the external wall andpreferably in the vicinity of the inlet openin The purpose of stitchingthe internal wa l to the external wall is to prevent the air pressure inthe dust collecting receptacle causing .the internal wall to collapseand thereby impede the escape of the air through the bore, but othermeans Within the scope of the claims may be provided for maintaining theinternal wall in a distended condilion.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

l. A dust collecting receptacle comprising a tubular external wall offabric material, having at its lower end an inlet for attachment to avacuum cleaner, a tubular internal wall of fabric material, having aninternal air duct and attached to the external all throughout its lengthat circumferential places, to form with it a plurality of separate dustcollecting chambers from which the air has egress through theforaminations of the internal wall to said duct and through theforaminations of the exter nal wall, the internal wall having a closedbottom opposed to the inlet and an opening through the external hall forthe escape of the air from said duct.

2. A dust collecting receptacle comprising a tubular external wall offabric mate rial, having at its lower end an inlet for attachment to avacuum cleaner, a tubular internal wall of fabric material, having aninternal air duct and attached at circumferential places to the externalwall, and forming therewith a plurality of separate ,dust collectingchambers, each in communication with the inlet, said internal wallhaving a closed bottom opposed to the inlet and an unimpeded outletforthe duct, extending through the external wall for the escape of theair therefrom.

Toronto. Ontario, Canada, February 10th, 1920.

MARTIN JOSEPH QUINN.

Signed in the resence of- CHAS. H. ICHES,

W. J. GILCHRIST.

